package br.com.sistema.util;

import java.io.IOException;

import javax.servlet.Filter;
import javax.servlet.FilterChain;
import javax.servlet.FilterConfig;
import javax.servlet.ServletException;
import javax.servlet.ServletRequest;
import javax.servlet.ServletResponse;

import org.hibernate.SessionFactory;

public class ConexaoHibernateFilter implements Filter{

	private SessionFactory session;

	@Override
	public void destroy() {
		
	}

	@Override
	public void doFilter(ServletRequest servletRequest, ServletResponse servletResponse,
			FilterChain filterChain) throws IOException, ServletException {
		try {
			this.session.getCurrentSession().beginTransaction();
			filterChain.doFilter(servletRequest, servletResponse);
			this.session.getCurrentSession().beginTransaction().commit();
			this.session.getCurrentSession().close();
		} catch (Throwable ex) {
			try {
				if(this.session.getCurrentSession().getTransaction().isActive()) {
					this.session.getCurrentSession().getTransaction().rollback();
				}
				
			} catch (Throwable exThrowable) {
				exThrowable.printStackTrace();
			}
			throw new ServletException();
		}
	}

	@Override
	public void init(FilterConfig conf) throws ServletException {
		session = HibernateUtil.getSessionFactory();
		
	}

}
